Tomohiro Nagatsuka is a supporting character in Koe no Katachi. He is the first person that talks to Shōya Ishida as an equal and is quick to call him a best friend. He is also the first person to lose the "X", signifying Ishida's trust. Tomohiro wears a yellow jumper with a white shirt underneath and a red undershirt. Usually, when he isn't wearing his uniform, he is seen wearing a scarf. Tomohiro has dark green curly hair and a chubby physique. At one point, he ends up growing a mustache as a token of good luck for Shōya Ishida. Nagaysuka has a strange personality. He is very protective of Ishida. He is very jolly and always joking or smiling.